while pod install show error

[iamguddu1234]

Akshays-MacBook-Air:Demo Ads akshaybhasme$ pod update
Update all pods
Updating local specs repositories
Analyzing dependencies
Downloading dependencies
Installing FBAudienceNetwork (6.15.2)
Generating Pods project

[!] [!] Xcodeproj doesn't know about the following attributes {"fileSystemSynchronizedGroups"=>["B2BFC1A02CB91C17006FA711"]} for the 'PBXNativeTarget' isa.
If this attribute was generated by Xcode please file an issue: https://github.com/CocoaPods/Xcodeproj/issues/new

[!] [!] Xcodeproj doesn't know about the following attributes {"fileSystemSynchronizedGroups"=>["B2BFC1B12CB91C19006FA711"]} for the 'PBXNativeTarget' isa.
If this attribute was generated by Xcode please file an issue: https://github.com/CocoaPods/Xcodeproj/issues/new

[!] [!] Xcodeproj doesn't know about the following attributes {"fileSystemSynchronizedGroups"=>["B2BFC1BB2CB91C19006FA711"]} for the 'PBXNativeTarget' isa.
If this attribute was generated by Xcode please file an issue: https://github.com/CocoaPods/Xcodeproj/issues/new

[!] [!] Xcodeproj doesn't know about the following attributes {"preferredProjectObjectVersion"=>"77"} for the 'PBXProject' isa.
If this attribute was generated by Xcode please file an issue: https://github.com/CocoaPods/Xcodeproj/issues/new

[!] [Xcodeproj] Xcode project version (77) is higher than the latest supported by xcodeproj (63).

[!] Automatically assigning platform iOS with version 18.0 on target Demo Ads because no platform was specified. Please specify a platform for this target in your Podfile. See https://guides.cocoapods.org/syntax/podfile.html#platform.
/Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/user_interface/error_report.rb:34:in force_encoding': can't modify frozen String (FrozenError) from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/user_interface/error_report.rb:34:in report'
from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/command.rb:66:in report_error' from /Library/Ruby/Gems/2.6.0/gems/claide-1.1.0/lib/claide/command.rb:396:in handle_exception'
from /Library/Ruby/Gems/2.6.0/gems/claide-1.1.0/lib/claide/command.rb:337:in rescue in run' from /Library/Ruby/Gems/2.6.0/gems/claide-1.1.0/lib/claide/command.rb:324:in run'
from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/command.rb:52:in run' from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/bin/pod:55:in <top (required)>'
from /Users/akshaybhasme/.gem/ruby/2.6.0/bin/pod:23:in load' from /Users/akshaybhasme/.gem/ruby/2.6.0/bin/pod:23:in

'
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project.rb:85:in initialize': [Xcodeproj] Unable to find compatibility version string for object version 77. (ArgumentError) from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/project.rb:48:in initialize'
from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer/xcode/pods_project_generator/project_generator.rb:82:in new' from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer/xcode/pods_project_generator/project_generator.rb:82:in create_project'
from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer/xcode/pods_project_generator/project_generator.rb:73:in generate!' from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer/xcode/single_pods_project_generator.rb:16:in generate!'
from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:320:in block in create_and_save_projects' from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/user_interface.rb:64:in section'
from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:315:in create_and_save_projects' from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:307:in generate_pods_project'
from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:183:in integrate' from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:170:in install!'
from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/command/update.rb:63:in run' from /Library/Ruby/Gems/2.6.0/gems/claide-1.1.0/lib/claide/command.rb:334:in run'
from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/lib/cocoapods/command.rb:52:in run' from /Users/akshaybhasme/.gem/ruby/2.6.0/gems/cocoapods-1.15.2/bin/pod:55:in <top (required)>'
from /Users/akshaybhasme/.gem/ruby/2.6.0/bin/pod:23:in load' from /Users/akshaybhasme/.gem/ruby/2.6.0/bin/pod:23:in '