I have looked at this thread: Warning: An unexpected error occurred and this also: Help! My Local site cannot establish a connection to WordPress.org and none of them have solved the issue. Please help.

Cannot download or update plugins

clay January 3, 2018, 5:02pm 6

Sorry about that!

Topic		Replies	Views
Wordpress could not establish a secure connection to wordpress.org error message after updating theme Support	2	320	September 29, 2021
Warning: An unexpected error occurred Support	21	7087	August 25, 2020
Error when installing plugins or updating plugins or themes Support	5	1242	August 25, 2020
Error trying to add new plugin Support	1	169	October 9, 2021
An unexpected error occurred Uncategorized	0	684	September 1, 2017