Unable build IOS on xcode 26

[robyrenata]

Hi,

we've encountered an issue while building our App fo IOS on Xcode 26 and it shows

InAppBrowserPlugin.swift > Extra argument 'customHeaders' in call

this is the cap sync output

✔ Copying web assets from www to ios/App/App/public in 217.01ms
✔ Creating capacitor.config.json in ios/App/App in 322.83μs
[info] Found 3 Cordova plugins for ios:
       cordova-plugin-inappbrowser@6.0.0
       es6-promise-plugin@4.2.2
       onesignal-cordova-plugin@5.2.15
✔ copy ios in 277.47ms
✔ Updating iOS plugins in 4.58ms
[info] Found 3 Cordova plugins for ios:
       cordova-plugin-inappbrowser@6.0.0
       es6-promise-plugin@4.2.2
       onesignal-cordova-plugin@5.2.15
✔ Updating iOS native dependencies with pod install in 2.80s
[info] Found 19 Capacitor plugins for ios:
       @aalzehla/capacitor-jailbreak-root-detection@1.1.1
       @capacitor/app@7.1.0
       @capacitor/browser@7.0.2
       @capacitor/camera@7.0.2
       @capacitor/clipboard@7.0.2
       @capacitor/device@7.0.2
       @capacitor/geolocation@7.1.5
       @capacitor/haptics@7.0.2
       @capacitor/inappbrowser@2.5.0
       @capacitor/keyboard@7.0.3
       @capacitor/network@7.0.2
       @capacitor/preferences@7.0.2
       @capacitor/screen-orientation@7.0.2
       @capacitor/share@7.0.2
       @capacitor/splash-screen@7.0.3
       @capacitor/status-bar@7.0.3
       @capacitor/toast@7.0.2
       @sentry/capacitor@2.3.1
       capacitor-camera-view@1.2.1
✔ update ios in 2.85s

[OS-pedrogustavobilro]

Hey @robyrenata I am not getting this error on my side. It would seem that the plugin is using an outdated version of OSInAppBrowserLib perhaps? But if so cap sync should have failed.

Can you try doing

cd ios/App/App
pod repo update
pod update OSInAppBrowserLib

then go back to app root folder and run cap sync and see if now the build passes.

[th0rgall]

I also had some trouble updating from npm version 2.3.1 to 2.5.0, I got an error during cap sync related to OSInAppBrowserLib.

I was able to follow the above instructions, but only after I changed my Xcode project format version from 8.0 to 16.0 (the objectVersion changed from 44 to 77). Setting Xcode 16.3 (objectVersion 90) did not work.

Now cap sync and my Xcode build succeeded.