framework not found GoogleMapsCore Error

Finally a solution:

pod deintegrate 
pod install

I had to reclone my Git project(because I had tried too many solutions to backtrack through new warnings and errors) then I just did the above commands in terminal.

For those using Ionic Framework,

Remove googlemap plugin and install again. It worked for me.

Though @Sam King's solution worked for me, I considered it as a hard fix without knowing the actual issue. The issue for my case was, I had accidentally deleted the GoogleMapsCore framework(Might be from 'Manage System Storage').

So, I just checked out an older version of my app and the issue got fixed.