Deleted Login

Hello Guys, I could really use some help. I deleted my login last week at the advice of my hosting company (whom I have now not heard back from in 3 days…).
It all started at the start of this month. I came up on the 2 year mark for a lot of my plugins… I started receiving different error messages. So I deactivated all my plugins and started to reinstall them one by one. I thought I did pretty good. I made a list of all my plugins and wrote down the dates they were last updated. I assumed that as long as it was updated within the last 6 months I should be good.
Not True.
All at the same time my hosting company unknown to me… migrated my account, https://www.usfishlaw.com, to a new server. The following week I keep receiving a fatal error message: home/content/81/9569181/html/wp-includes/link-template.php on line 271…
So I did what was natural and contacted my hosting company (GoDaddy). They told me: “After reviewing your hosting account, I was not able to replicate this error with the information provided. We will need a full error code to make sure we are on track, but it appears to not be hosting related. I grabbed the last part of the error message and searched through the search engines and found the following:

https://www.ads-software.com/support/topic/plugin-theme-my-login-fatal-error-link-templatephp-on-line-274

Seems to be an issue with the plugin. You can disable the Theme My Login plugin from within the WordPress dashboard or through renaming the individual plugin folder within /wp-content/plugins/ to theme-my-plugins.disabled for testing. Please let us know if we can assist you in any other way.” Nothing further… in 3 days even after I contacted them back.

Help me out, I assumed that if I deleted the login plugin that it would revert to a default wordpress login? Had I known that I should have replace that plugin with a newer updated plugin, clearly I would have done it right then… But I’m past that now…

How do I fix it? Please… Make my day ??