Q. Build Issue

Error (Xcode): Cycle inside Runner; building could produce unreliable results

A. In Xcode > Targets > Runner > Build Phases, drag and arrange Embed Frameworks, [CP] Embed Pods Frameworks, and Embed Foundation Extensions so that they are above Run Script. Refer this for more details.

Q. Pod install issue

[!] The following Swift pods cannot yet be integrated as static libraries:

The Swift pod fyno-push-ios depends upon FMDB, which does not define modules. To opt into those targets generating module maps (which is necessary to import them from Swift when building as static libraries), you may set use_modular_headers! globally in your Podfile, or specify :modular_headers => true for particular dependencies.

A. Add use_modular_headers! in your Podfile similar to:

target '<application_name>' do

Also, comment the :flipper_configuration => flipper_config, line.