How can I resolve pod install issue and successfully run pod install?

August 25, 2024

I’m experiencing the same issue while trying to recompile and build a project for a customer after a clean macOS Sonoma install and installing Xcode 15.4. When I run pod install, I encounter the following error:

error: EXML::ParseException - #<TypeError: wrong argument type String (expected Regexp)>
/Library/Ruby/Gems/2.6.0/gems/rexml-3.2.9/lib/rexml/source.rb:220:in `scan'
/Library/Ruby/Gems/2.6.0/gems/rexml-3.2.9/lib/rexml/source.rb:220:in `match'
/Library/Ruby/Gems/2.6.0/gems/rexml-3.2.9/lib/rexml/parsers/baseparser.rb:227:in `pull_event'
/Library/Ruby/Gems/2.6.0/gems/rexml-3.2.9/lib/rexml/parsers/baseparser.rb:207:in `pull'
/Library/Ruby/Gems/2.6.0/gems/rexml-3.2.9/lib/rexml/parsers/treeparser.rb:23:in `parse'
/Library/Ruby/Gems/2.6.0/gems/rexml-3.2.9/lib/rexml/document.rb:448:in `build'
/Library/Ruby/Gems/2.6.0/gems/rexml-3.2.9/lib/rexml/document.rb:101:in `initialize'
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.24.0/lib/xcodeproj/workspace.rb:83:in `new'
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.24.0/lib/xcodeproj/workspace.rb:83:in `from_s'
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.24.0/lib/xcodeproj/workspace.rb:66:in `new_from_xcworkspace'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer/user_project_integrator.rb:102:in `create_workspace'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer/user_project_integrator.rb:71:in `integrate!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:929:in `block in integrate_user_project'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:925:in `integrate_user_project'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:185:in `integrate'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:170:in `install!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/command/install.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/claide-1.1.0/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.15.2/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'

It seems to be related to the rexml gem. How can I resolve this issue and successfully run pod install?

>Solution :

To resolve the issue, I followed these steps:

Uninstalled CocoaPods:
```
sudo gem uninstall cocoapods
```
Uninstalled rexml:
```
sudo gem uninstall rexml
```
Installed CocoaPods version 1.13.0:
```
sudo gem install cocoapods -v 1.13.0
```
Uninstalled rexml again (just to be safe).
Installed rexml version 3.2.4:
```
sudo gem install rexml -v 3.2.4
```

After performing these steps, I was able to run pod install successfully without encountering the TypeError: wrong argument type String (expected Regexp) error.

It appears that the issue was caused by a compatibility problem between the latest versions of CocoaPods and rexml. By downgrading CocoaPods to version 1.13.0 and installing a specific version of rexml (3.2.4), the conflict was resolved.