FWIW - Browser "Cookie" (aka: Tracker) acceptance may POSSIBLY be the problem with error messages or random/mysterious happenings with a website. After experiencing similar issues in past years, I did a large amount of research to help resolve them. Cookie usage was a key factor with my findings. They will follow you everywhere!
Especially if you have Google Chrome as your internet browser, Google is constantly tracking your browsing habits with browser-stored "cookies. This is done, because once a profile is built on you, they sell the info to 3rd parties for advertising purposes. It's a money-making issue - and totally legal. Google also hires other tracking firms to obtain such info from other browsers, like Firefox and MS Edge, etc. Google is the World leader for tracking measures. However, they are not the only browser that uses tracking methods, or hires-out for the same purpose.
Tracking is done with use of a website's "cookies". If you accept all cookies, through your browser's Privacy settings, this permits Google "and other trackers" to obtain the desired info about you. If you don't accept cookies in the privacy settings, an installed anti-virus program like McAfee and others, will intervene and block interactions on a website that uses cookies for their own use. Some Ad-blockers will do the same thing. Numerous websites use cookies to mainly simplify a User's use of their website. However, some may be needed for platform-operating purposes. If you choose not to accept 3rd party cookies in your browser's privacy settings, that may affect browsing on that site. Those websites may, or may not sell the profile info to a 3rd party.
I configure all browsers to accept all cookies, including 3rd party cookies. My work-around for anti-tracking, is to make sure a browser's Privacy setting is "checked" to delete ALL cookies at the end of an internet session. Additionally, if your anti-virus program has a manual or auto-method of removing "trackers" (cookies), I find that it's wise to use that capability often. With my use of McAfee A/V's options for deletion of trackers, I seldom experience issues with interacting on any website. Many other anti-virus programs may offer similar functions. And if you do not have an anti-virus program installed, any browser's "settings" menu should offer the same cookie-deletion option.
Also, deleting all cookies at the end of a browsing session, does not affect your next visit to a specific website that may need cookies to operate. New cookies are developed at the beginning of the session.
*Again, this is only one possiblity for a problem remedy.
