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I resolved the issue. In case anyone is experiencing a similar issue, I’ll explain.
I use siteground hosting and was experiencing trouble signing in through the /wp-admin link. I was able to access the wordpress dashboard through the siteground platform.
The /wp-admin link was generating two separate errors. The two errors I was receiving were:
PHP Warning: Cannot modify header information – headers already sent in public_html/wp-includes/pluggable.php on line 1083
PHP Notice: wc_ajax_headers cannot set headers – headers already sent by on line 0 in public_html/wp-content/plugins/woocommerce/includes/class-wc-ajax.php on line 70
I contacted siteground support multiple times supplying them more information to try and resolve the issue and like most hosting/plugin support, I was advised to do the usual. Deactivate themes and deactivate plugins etc. When none of these solutions worked I was told to hire a wordpress developer.
In a last-ditch attempt I updated the php to 8.0.23. Sitegrounds default php option is set to managed which means siteground automatically handle the php version of your website. I switched to the manual option and set the php version to 8.0.23 and my issue was resolved.