After years of exploring the Roblox platform, I of all people know that it's no stranger to errors, bugs, and glitches, but that doesn't make experiencing them any less annoying—especially when they're ones that I don't even understand! In some cases, these errors can be solved by the user and disappear in just a few seconds; in others, it's up to Roblox to come to the rescue and decipher the root of the issue. In the case of the "an error occurred and Roblox cannot continue" error, it seems to be a bit of both.
How to solve 'an error occurred and Roblox cannot continue'
When this error appears on your screen, it will likely read "An error occurred and Roblox cannot continue. Expected channel name when using -channel, use for empty value," which can easily leave players confused as to what that means. To put it simply, when this error occurs, it's likely an issue with the specific version of Roblox that you're playing on. A lot of the time, players can fix this issue by simply deleting the Roblox app from their device and then re-downloading it again after a few minutes.
If this doesn't work, you could try disconnecting and reconnecting to the internet, and then clearing your browser data/history, which will clear up all space taken up by cookies, cached images and files, and your general browsing data. When your computer gets too bogged down with stored data, any websites you try to access or games you try to play can begin experiencing issues and will load slower, which could be the case for Roblox if you're receiving this error.
If the issue persists, it may be a glitch on Roblox's end, which means you can either reach out to Roblox support and explain your issue, or wait and see if the problem is fixed on its own. I'd also suggest checking the Roblox status website, or asking other players if they're having issues as well, while you wait.
As mentioned above, this error can randomly appear for many reasons, but is typically associated with the issues highlighted in this guide. If you receive this error code consistently, and the reasons for receiving said code don't apply to you, you may need to contact Roblox support directly and explain your situation if you haven't already.