Notion has this page to Troubleshoot and Reset Notion. I work with so many different client workspaces that my cache often gets messed up. So I wrote this script (Windows) to

• Kill all running instnaces of Notion, and
• Clear the cache from AppData\Roaming\Notion

Anybody who knows what they are doing would never download a command script from an unknown site, so I’m including the text below. You’ll want to save this to a file with a .cmd extention, then you can reset your Notion cache on demaind.

@echo off
cls
@echo.
@echo This script will reset Notion to fix common problems.
@Echo It does what Notion Support wil invariably ask you to do.
@echo.
@echo First, we are going to exit/kill all running copies of Notion on this machine.
pause
cls
taskkill /f /fi "IMAGENAME eq Notion.exe"
@echo ---------------------
@Echo.
@Echo If there were a BUNCH of procsses killed, you can exit now (Ctrl-C) and see if that fixed the problem.
@echo.
@Echo Otherwise, we weill clean up the AppData (caching) files next.
@echo These are found under the AppData\Roaming\Notions
@Echo.
@Echo The current User = %USERNAME%
@Echo IF THE USER IS BLANK, THEN ABORT NOW - Ctrl-C
@Echo.
@echo We are about to delete from: C:\Users\%USERNAME%\AppData\Roaming\Notion
@echo You can exit now (Ctrl-C), or 
Pause
del /f /q /s C:\Users\%USERNAME%\AppData\Roaming\Notion\*.*
rmdir /s /q  C:\Users\%USERNAME%\AppData\Roaming\Notion\
@echo.
@echo You can re-start Notion now.  You will have to log in again.