I have tried to compile a new program from scratch and it effectively compiles and executes it correctly, so I think it is something internal to my application (some library that is given problems or something).
I cut and paste the error message that the compiler gives when I try to compile that particular application in 64 bits:
Checking project dependencies ...
Building STORE.dproj (Debug, Android64)
[Exec Error] The command "PATH C: \ Program Files (x86) \ Java \ jdk1.8.0_144 \ bin; C: \ Users \ Public \ Documents \ Embarcadero \ InterBase \ redist \ InterBase2020 \ IDE_spoof; C: \ ProgramData \ Oracle \ Java \ javapath; C: \ Program Files (x86) \ Embarcadero \ Studio \ 20.0 \ bin; C: \ Users \ Public \ Documents \ Embarcadero \ Studio \ 20.0 \ Bpl; C: \ Program Files (x86) \ Embarcadero \ Studio \ 20.0 \ bin64; C: \ Users \ Public \ Documents \ Embarcadero \ Studio \ 20.0 \ Bpl \ Win64; C: \ Program Files (x86) \ Embarcadero \ Studio \ 20.0 \ bin64 \ Win64; C: \ ProgramData \ Oracle \ Java \ javapath64 \ Win64; C: \ Program Files (x86) \ Common Files \ Oracle \ Java \ javapath; C: \ Windows \ system32; C: \ Windows; C: \ Windows \ System32 \ Wbem; C: \ Windows \ System32 \ WindowsPowerShell \ v1.0 \; C: \ Program Files (x86) \ NVIDIA Corporation \ PhysX \ Common; C: \ WINDOWS \ system32; C: \ WINDOWS; C: \ WINDOWS \ System32 \ Wbem; C: \ WINDOWS \ System32 \ WindowsPowerShell \ v1.0 \; C: \ WINDOWS \ System32 \ OpenSSH \; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D140; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D150; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D160; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D170 ; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D180; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D190; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D200; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D210; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D220; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D230; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D240; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D250; C: \ Program Files \ NVIDIA Corporation \ NVIDIA NvDLISR; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D260; C: \ Delphi_Tokyo \ PlatformSDKs \ android-sdk-windows ;; C: \ WINDOWS \ system32 ; C: \ WINDOWS; C: \ WINDOWS \ System32 \ Wbem; C: \ WINDOWS \ System32 \ WindowsPowerShell \ v1.0 \; C: \ WINDOWS \ System32 \ OpenSSH \; C: \ Program Files \ dotnet \; C: \ Program Files \ Microsoft SQL Server \ 130 \ Tools \ Binn \; C: \ Program Files \ Microsoft SQL Server \ Client SDK \ ODBC \ 170 \ Tools \ Binn \; C: \ Users \ nacho \ AppData \ Local \ Microsoft \ WindowsApps; C: \ Delphi_Tokyo \ PlatformSDKs \ android-sdk-windows ;; C: \ Comps \ RiverSoftAVG \ Bin \ Win32 \ D260 & "C: \ Users \ Public \ Documents \ Embarcadero \ Studio \ 20.0 \ CatalogRepository \ AndroidSDK-2525_20 .0.36039.7899 \ build-tools \ 28.0.2 \ dx.bat "--dex --output =" F: \ almacendiav3 \ Android64 \ Debug \ classes.dex "" c: \ program files (x86) \ jetty \ studio \ 20.0 \ lib \ android \ Debug \ cloud-messaging.dex.jar "" c: \ program files (x86) \ jetty \ studio \ 20.0 \ lib \ android \ Debug \ fmx.dex.jar "" c: \ program files (x86) \ jetty \ studio \ 20.0 \ lib \ android \ Debug \ google-play-billing.dex.jar " "c: \ program files (x86) \ jetty \ studio \ 20.0 \ lib \ android \ Debug \ google-play-licensing.dex.jar" "F: \ almacendiav3 \ Android64 \ Debug \ android-support-v13-dexed. jar "" F: \ almacendiav3 \ Android64 \ Debug \ CustomTabs-dexed.jar "" F: \ almacendiav3 \ Android64 \ Debug \ JavaScriptHelper-dexed.jar "" F: \ almacendiav3 \ Android64 \ Debug \ CustomTabs-dexed.jar " "F: \ almacendiav3 \ Android64 \ Debug \ android-support-v13-dexed.jar" "exited with code 2.
Failed
Elapsed time: 00: 00: 01.2