After update to version 3 Ghost won't start

Developer help
5

Hi,

the result of npm update --force

ghost_user@ghostname:/var/www/ghostname.com/html/blog$ ghost update --force
+ sudo systemctl is-active ghostname-com
? Sudo Password [hidden]
✔ Checking system Node.js version
✔ Ensuring user is not logged in as ghost user
✔ Checking if logged in user is directory owner
✔ Checking current folder permissions
✔ Checking folder permissions
✔ Checking file permissions
✔ Checking content folder ownership
✔ Checking memory availability
✔ Checking for available migrations
✔ Checking for latest Ghost version
✔ Downloading and updating Ghost to v3.0.0
✔ Linking latest Ghost and recording versions
ℹ Removing old Ghost versions [skipped]

seems all fine
then into the versions/3.0.0 I get an errror doing sudo npm rebuild

ghost_user@ghostname:/var/www/ghostname.com/html/blog/versions/3.0.0$ sudo npm rebuild

> core-js@2.6.9 postinstall /var/www/ghostname.com/html/blog/versions/3.0.0/node_modules/core-js
> node scripts/postinstall || echo "ignore"

Thank you for using core-js ( https://github.com/zloirock/core-js ) for polyfilling JavaScript standard library!

The project needs your help! Please consider supporting of core-js on Open Collective or Patreon:
> https://opencollective.com/core-js
> https://www.patreon.com/zloirock

Also, the author of core-js ( https://github.com/zloirock ) is looking for a good job -)


> jsonpath@1.0.2 postinstall /var/www/ghostname.com/html/blog/versions/3.0.0/node_modules/jsonpath
> node lib/aesprim.js > generated/aesprim-browser.js


> sharp@0.23.1 install /var/www/ghostname.com/html/blog/versions/3.0.0/node_modules/sharp
> (node install/libvips && node install/dll-copy && prebuild-install) || (node-gyp rebuild && node install/dll-copy)

info sharp Using existing vendored libvips v8.8.1
Traceback (most recent call last):
  File "/usr/local/lib/node_modules/npm/node_modules/node-gyp/gyp/gyp_main.py", line 47, in <module>
    import gyp
  File "/usr/local/lib/node_modules/npm/node_modules/node-gyp/gyp/pylib/gyp/__init__.py", line 10, in <module>
    import gyp.input
  File "/usr/local/lib/node_modules/npm/node_modules/node-gyp/gyp/pylib/gyp/input.py", line 7, in <module>
    import ast
ImportError: No module named ast
gyp ERR! configure error
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:351:16)
gyp ERR! stack     at ChildProcess.emit (events.js:210:5)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:272:12)
gyp ERR! System Linux 4.15.0-23-generic
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /var/www/ghostname.com/html/blog/versions/3.0.0/node_modules/sharp
gyp ERR! node -v v12.13.0
gyp ERR! node-gyp -v v5.0.5
gyp ERR! not ok
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! sharp@0.23.1 install: `(node install/libvips && node install/dll-copy && prebuild-install) || (node-gyp rebuild && node install/dll-copy)`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the sharp@0.23.1 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.