The theme plug-ins, I believe booking, core, listing and instagram-feed, are preventing me from being able to access the WordPress dashboard when logging into WordPress.
Have you tried contacting the author of that theme? Here is their support information - https://themeforest.net/item/search-go-modern-smart-directory-theme/15365040/support
When I tried it said my license support had expired.
You should be able to go in via FTP to disable any plugins that are causing a problem. Or you can certainly extend the theme’s support and get help from the author - https://themeforest.net/item/search-go-modern-smart-directory-theme/15365040
Yes I can disable the plugins but they are crucial to the function of the theme and website, so that’s not a solution…
Hoping someone can help me without having to pay to extend my support.
Still, you should start by deactivaing all of the plugins and reactivating them one by one. This way you can find the faulty plugin and start looking for solution from there. I believe most of them can be replaced with similar plugins (although you may need to add your own styling to them to match current site look).
Please make sure your theme and plugins are up to date. Things change on a daily basis and author usually release fixed versions of their products.
If that won’t help, you may really consider extending/renewing your support, it’s still less expensive than paying someone to fix all the issues: