Help/Support Sideloadly: Failed: (3019) Authentication Error. Xcode 7.3 or later is required

[TAMP0N 93 iPhone 8 11.2.1 Donor]

i get this error every time i try to sign an app

 

Failed: (3019) Authentication Error. Xcode 7.3 or later is required to continue developing with your Apple ID.

Updated August 2, 2020 by Rook

[Rook 551k iPad Pro (2nd gen) 17.4 Donor]

Hello,

 Do you have any advanced options enabled? Make sure the Anisette option is ticked.

Updated May 12, 2021 by Rook

[TAMP0N 93 iPhone 8 11.2.1 Donor]

Just now, Rook said:

Hello,

 Do you have any advanced options enabled?

i dont have any of them selected no

[Rook 551k iPad Pro (2nd gen) 17.4 Donor]

Just now, TAMP0N said:

i dont have any of them selected no

Is your Apple ID part of a team?

[TAMP0N 93 iPhone 8 11.2.1 Donor]

Just now, Rook said:

Is your Apple ID part of a team?

not to my knowledge no. i dont think i am.

 

[Rook 551k iPad Pro (2nd gen) 17.4 Donor]

1 minute ago, TAMP0N said:

not to my knowledge no. i dont think i am.

 

Do you have another Apple ID to test?

[TAMP0N 93 iPhone 8 11.2.1 Donor]

Just now, Rook said:

Do you have another Apple ID to test?

i dont at he moment. ill make one and let you know. might take awhile

 

2 minutes ago, Rook said:

Do you have another Apple ID to test?

yeah but keeps doing this

Obtaining team ID

Using team "null" (Individual) with id null

[Rook 551k iPad Pro (2nd gen) 17.4 Donor]

11 minutes ago, TAMP0N said:

i dont at he moment. ill make one and let you know. might take awhile

 

yeah but keeps doing this

Obtaining team ID

Using team "null" (Individual) with id null

Does it get stuck there?

[TAMP0N 93 iPhone 8 11.2.1 Donor]

3 minutes ago, Rook said:

Does it get stuck there?

this is the whole error

 

Checking iOS version...

iOS version 13.3.1, will not mangle bundleID

Obtaining team ID

Using team "REDACTED" (Individual) with id REDACTED

Making sure device ID REDACTED is registered

Failed: (3019) Authentication Error. Xcode 7.3 or later is required to continue developing with your Apple ID.

[Rook 551k iPad Pro (2nd gen) 17.4 Donor]

6 minutes ago, TAMP0N said:

this is the whole error

 

Checking iOS version...

iOS version 13.3.1, will not mangle bundleID

Obtaining team ID

Using team "REDACTED" (Individual) with id REDACTED

Making sure device ID REDACTED is registered

Failed: (3019) Authentication Error. Xcode 7.3 or later is required to continue developing with your Apple ID.

It’s possible that your antivirus or firewall  or something else on your PC is blocking Sideloadly. Could you check and whitelist if possible?