Hi MD. I'm Greg, eleven years awarded MVP, Volunteer Moderator, and Independent Advisor here to help you until this is resolved.
See fixes for the error:
https://support.google.com/mail/thread/2313112?...
https://www.meersworld.net/2019/01/how-to-resol...
https://support.google.com/sites/thread/3239378...
https://www.youtube.com/watch?v=c3BOvQ5pl4E
Try another browser. I would have several browsers on your task bar so there's always one that's best for the task. I use Firefox, Edge and Chrome in that order of preference. It's easy to share bookmarks between all of them in their settings under Import Favorites from another Browser. Firefox and Chrome let you sign in to save and/or sync your Favorites on any other device you sign into, and are more reliable than Edge at doing this. Set the preferred browser as Default in Settings > Apps > Default Apps.
Firefox download: https://www.mozilla.org/en-US/firefox/new/
Chrome download: https://www.google.com/chrome/
I would also use Windows 10 Mail app which is an easier way to access your mail from all your various accounts in one huge inbox that lets you merge all of your Office and Web Mail account, with an even larger ad-free reading pane. See here how to get started:
https://www.windowscentral.com/how-get-started-...
Add Gmail: https://www.groovypost.com/howto/add-gmail-emai...
Gmail must have less-secure apps setting changed here:
https://support.google.com/accounts/answer/6010...
I hope this helps. Based on what you report back I can answer any questions and may have other steps to perform. If you'll wait to rate whether my post resolved your problem, I will keep working with you until it's resolved.
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