Error occuring when returning to Anki main deck page

[masonc15]

Problem description

Hello, I am getting an error when going back out from studying cards to the Anki main deck page. The debug output is below. Thanks!

Debug info:
Anki 2.1.39 (576f0043) Python 3.8.6 Qt 5.14.2 PyQt 5.14.2
Platform: Windows 10
Flags: frz=True ao=True sv=2
Add-ons, last update check: 2021-03-13 19:25:02

Caught exception:
Traceback (most recent call last):
  File "aqt\webview.py", line 35, in cmd
  File "aqt\webview.py", line 124, in _onCmd
  File "aqt\webview.py", line 569, in _onBridgeCmd
  File "<decorator-gen-92>", line 2, in _linkHandler
  File "anki\hooks.py", line 89, in decorator_wrapper
  File "anki\hooks.py", line 86, in repl
  File "C:\Users\Colin\AppData\Roaming\Anki2\addons21\review_heatmap\links.py", line 69, in heatmapLinkHandler
    return None if not _old else _old(self, url)
  File "<decorator-gen-14>", line 2, in _linkHandler
  File "anki\hooks.py", line 89, in decorator_wrapper
  File "anki\hooks.py", line 84, in repl
  File "aqt\deckbrowser.py", line 68, in _linkHandler
ValueError: too many values to unpack (expected 2)