Problems with building Chromium for Android

I want building Chromium for Android and used Instructions by link:
chromium.googlesource.com/chromium/src/+/HEAD/docs/android_build_instructions.md
I try Ubuntu 16.04, 18.04, 20.04, Python2, Python3, but always the same problems:
$ gclient sync or gclient runhooks

Running hooks:  48% (71/147) doclava                                                
________ running ‘python3 src/build/android/download_doclava.py’ in ‘/root/chromium’
0> Downloading src/build/android/../../buildtools/android/doclava.tar.gz@1931becb8a8e21685f39c62854e9e814d64ccf1a…
0> Extracting 7 entries from src/build/android/../../buildtools/android/doclava.tar.gz to src/build/android/../../buildtools/android/doclava
Downloading 1 files took 5.953311 second(s)
Running hooks:  64% (95/147) Generate location tags for tests                          
________ running ‘python3 src/testing/generate_location_tags.py –out src/testing/location_tags.json’ in ‘/root/chromium’
/root/chromium/src/third_party/depot_tools/dirmd: line 14: /root/chromium/src/third_party/depot_tools/.cipd_bin/dirmd: No such file or directory
Error: Command ‘python3 src/testing/generate_location_tags.py –out src/testing/location_tags.json’ returned non-zero exit status 127 in /root/chromium
/root/chromium/src/third_party/depot_tools/dirmd: line 14: /root/chromium/src/third_party/depot_tools/.cipd_bin/dirmd: No such file or directory

How to solve this problem?

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