Unable to install new plugins – “An unexpected error occurred”

When I try to search for new plugins, if I include a space in my search term, I get this error:

“An unexpected error occurred. Something may be wrong with www.remarpro.com or this server’s configuration. If you continue to have problems, please try the?support forums.”

If I search for a single word without a space, I can find plugins as normal but when I try to install it, I get this error:

“Installation failed: An unexpected error occurred. Something may be wrong with www.remarpro.com or this server’s configuration. If you continue to have problems, please try the?support forums.”

I have the latest version of WordPress (6.4.3) and I manually upgraded to PHP 8.2, because one of the plugins I was using required 8.1 or higher.

The most recent thing I did in the past 24 hours was delete a plugin that refused to delete from inside the WordPress backend, from my hosting control panel from the wp-content –> plugins folder, and deleted another plugin that I didn’t even know I had (it was in a folder called mu-plugin in my hosting control panel).

I can activate plugins that are already installed but I cannot search for or install new ones.