Class AMSupportURLConnectionDelegate is implemented in both

by

try a simple, documented step first

In Terminal:

sudo xcode-select -r

explanation

The command resets xcode to the default path (see documentation excerpt below). This command

  • resolved the issue for me and
  • avoided the risk of introducing random, undocumented ideas from strangers.

These advantages make it worth trying first, especially since documented approaches typically won’t interfere with future version upgrades. Experimental workarounds may need to be undone first.

documentation

% xcode-select -h
Usage: xcode-select [options]

Print or change the path to the active developer directory. This directory
controls which tools are used for the Xcode command line tools (for example, 
xcodebuild) as well as the BSD development commands (such as cc and make).

Options:
  -h, --help                  print this help message and exit
[...]
  -r, --reset                 reset to the default command line tools path

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