I have an answer for you :)
MT4 developers released a new build, 1420, and banned indicators/EAs that they do not want us to use :)
They want to make everyone use their market to purchase stuff :)
Basically, the indicators/EAs they do not want us to use are cracked versions.
So, you are either using a free cracked indicator/EA or bought a cracked indicator/EA, which is why it is no longer working for you.
I am sorry, I know it's not the answer you were looking for :)
You must recompile your code.
New MetaTrader 4 Platform build 1420 - MQL4 programming forum (2024.05.24)
Stop using stolen programs.
Version 1420 will soon become the minimum supported version.
New version of MetaTrader 4 build 1420 - MQL4 Algo Trading Forum - Page 2 #12 (2024.05.27)

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Unable to connect my EA to MT4 all of a sudden yet its been working on the account.
I am getting the below error;
2024.06.03 06:30:42.116 cannot load 'C:\Users\Administrator\AppData\Roaming\MetaQuotes\Terminal\9E1B7C64C22DC2B6AAD000B3A8AB1869\MQL4\Experts'
Anyone who knows why it's not connecting?