diff --git a/src/chrome/ShareSheet.js b/src/chrome/ShareSheet.js
index b1a318a54..25c582980 100644
--- a/src/chrome/ShareSheet.js
+++ b/src/chrome/ShareSheet.js
@@ -22,6 +22,7 @@ import {shareFlipperData} from '../fb-stubs/user';
 import {exportStore, EXPORT_FLIPPER_TRACE_EVENT} from '../utils/exportData.js';
 import PropTypes from 'prop-types';
 import {clipboard} from 'electron';
+import ShareSheetErrorList from './ShareSheetErrorList.js';
 import {reportPlatformFailures} from '../utils/metrics';
 // $FlowFixMe: Missing type defs for node built-in.
 import {performance} from 'perf_hooks';
@@ -42,36 +43,27 @@ const Uploading = styled(Text)({
   marginTop: 15,
 });
 
-const ErrorMessage = styled(Text)({
-  display: 'block',
-  marginTop: 6,
-  wordBreak: 'break-all',
-  whiteSpace: 'pre-line',
-  lineHeight: 1.35,
-});
-
 const Copy = styled(Input)({
   marginRight: 0,
   marginBottom: 15,
 });
 
-const Title = styled(Text)({
-  marginBottom: 6,
-});
-
 const InfoText = styled(Text)({
   lineHeight: 1.35,
   marginBottom: 15,
 });
 
-const Padder = styled('div')(
-  ({paddingLeft, paddingRight, paddingBottom, paddingTop}) => ({
-    paddingLeft: paddingLeft || 0,
-    paddingRight: paddingRight || 0,
-    paddingBottom: paddingBottom || 0,
-    paddingTop: paddingTop || 0,
-  }),
-);
+const Title = styled(Text)({
+  marginBottom: 6,
+});
+
+const ErrorMessage = styled(Text)({
+  display: 'block',
+  marginTop: 6,
+  wordBreak: 'break-all',
+  whiteSpace: 'pre-line',
+  lineHeight: 1.35,
+});
 
 type Props = {
   onHide: () => mixed,
@@ -153,20 +145,7 @@ export default class ShareSheet extends Component<Props, State> {
                     data might contain sensitve information like access tokens
                     used in network requests.
                   </InfoText>
-                  {this.state.errorArray.length > 0 && (
-                    <Padder paddingBottom={8}>
-                      <FlexColumn>
-                        <Title bold>
-                          The following errors occurred while exporting your
-                          data
-                        </Title>
-                        {this.state.errorArray.map((e: Error) => {
-                          return (
-                            <ErrorMessage code>{e.toString()}</ErrorMessage>
-                          );
-                        })}
-                      </FlexColumn>
-                    </Padder>
+                  <ShareSheetErrorList errors={this.state.errorArray} />
                   )}
                 </>
               ) : (
diff --git a/src/chrome/ShareSheetErrorList.js b/src/chrome/ShareSheetErrorList.js
new file mode 100644
index 000000000..2c1c39401
--- /dev/null
+++ b/src/chrome/ShareSheetErrorList.js
@@ -0,0 +1,69 @@
+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+import {PureComponent, FlexColumn, Text, styled} from 'flipper';
+
+type Props = {|
+  errors: Array<Error>,
+|};
+
+const ErrorMessage = styled(Text)({
+  display: 'block',
+  marginTop: 6,
+  wordBreak: 'break-all',
+  whiteSpace: 'pre-line',
+  lineHeight: 1.35,
+});
+
+const Padder = styled('div')(
+  ({paddingLeft, paddingRight, paddingBottom, paddingTop}) => ({
+    paddingLeft: paddingLeft || 0,
+    paddingRight: paddingRight || 0,
+    paddingBottom: paddingBottom || 0,
+    paddingTop: paddingTop || 0,
+  }),
+);
+
+const Title = styled(Text)({
+  marginBottom: 6,
+});
+
+export function formatError(e: Error): string {
+  const estr = e.toString();
+
+  if (estr === '[object Object]') {
+    try {
+      return JSON.stringify(e);
+    } catch (e) {
+      return '<unrepresentable error>';
+    }
+  }
+
+  return estr;
+}
+
+export default class Popover extends PureComponent<Props> {
+  render() {
+    if (this.props.errors.length === 0) {
+      return null;
+    }
+    return (
+      <>
+        <Padder paddingBottom={8}>
+          <FlexColumn>
+            <Title bold>
+              The following errors occurred while exporting your data
+            </Title>
+            {this.props.errors.map((e: Error) => (
+              <ErrorMessage code>{formatError(e)}</ErrorMessage>
+            ))}
+          </FlexColumn>
+        </Padder>
+      </>
+    );
+  }
+}
diff --git a/src/chrome/ShareSheetExportFile.js b/src/chrome/ShareSheetExportFile.js
index 7ec491e2f..40353524b 100644
--- a/src/chrome/ShareSheetExportFile.js
+++ b/src/chrome/ShareSheetExportFile.js
@@ -24,6 +24,7 @@ import {
   EXPORT_FLIPPER_TRACE_EVENT,
 } from '../utils/exportData.js';
 import PropTypes from 'prop-types';
+import ShareSheetErrorList from './ShareSheetErrorList.js';
 
 const Container = styled(FlexColumn)({
   padding: 20,
@@ -57,20 +58,12 @@ const InfoText = styled(Text)({
   marginBottom: 15,
 });
 
-const Padder = styled('div')(
-  ({paddingLeft, paddingRight, paddingBottom, paddingTop}) => ({
-    paddingLeft: paddingLeft || 0,
-    paddingRight: paddingRight || 0,
-    paddingBottom: paddingBottom || 0,
-    paddingTop: paddingTop || 0,
-  }),
-);
-
 type Props = {
   onHide: () => mixed,
   file: ?string,
   logger: Logger,
 };
+
 type State = {
   errorArray: Array<Error>,
   result: ?{
@@ -128,16 +121,7 @@ export default class ShareSheetExportFile extends Component<Props, State> {
                 might contain sensitive information like access tokens used in
                 network requests.
               </InfoText>
-              {this.state.errorArray.length > 0 && (
-                <Padder paddingBottom={8}>
-                  <FlexColumn>
-                    <Title bold>Errors: </Title>
-                    {this.state.errorArray.map((e: Error) => {
-                      return <ErrorMessage code>{e.toString()}</ErrorMessage>;
-                    })}
-                  </FlexColumn>
-                </Padder>
-              )}
+              <ShareSheetErrorList errors={this.state.errorArray} />
             </FlexColumn>
             <FlexRow>
               <Spacer />
diff --git a/src/chrome/__tests__/ShareSheetErrorList.node.js b/src/chrome/__tests__/ShareSheetErrorList.node.js
new file mode 100644
index 000000000..1c112bd21
--- /dev/null
+++ b/src/chrome/__tests__/ShareSheetErrorList.node.js
@@ -0,0 +1,24 @@
+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+import {formatError} from '../ShareSheetErrorList.js';
+
+test('normal error is formatted', () => {
+  const e = new Error('something went wrong');
+  expect(formatError(e)).toEqual('Error: something went wrong');
+});
+
+test('objects are formatted', () => {
+  const e: any = {iam: 'not an error'};
+  expect(formatError(e)).toEqual('{"iam":"not an error"}');
+});
+
+test('recursive data structures are not formatted', () => {
+  const e: any = {b: null};
+  e.b = e;
+  expect(formatError(e)).toEqual('<unrepresentable error>');
+});