make: error

[eexpress]

Compile error

⭕ pi cmake libgee-0.8-dev libgranite-dev libgtksourceview-3.0-dev libwebkit2gtk-4.0-dev libsqlite3-dev libgtkspell3-3-dev libmarkdown2-dev libgtk-3-dev valac
<= INSTALL DEV
⭕ cmake -DCMAKE_INSTALL_PREFIX=/usr ../ -Dnoele=1
<= OK
⭕ make
[100%] Built target com.github.philip-scott.notes-up
/bin/sh: 1: MSGFMT_EXECUTABLE-NOTFOUND: not found
make[2]: *** [po/CMakeFiles/i18n.dir/build.make:57: i18n] Error 127
make[1]: *** [CMakeFiles/Makefile2:193: po/CMakeFiles/i18n.dir/all] Error 2
make: *** [Makefile:130: all] Error 2
⭕ cat /etc/issue
Ubuntu 20.04.2 LTS \n \l

PPA error

错误:24 http://packages.elementary.io/appcenter focal Release                            
  404  Not Found [IP: 104.21.3.130 80]
正在读取软件包列表... 完成                                                               
E: 仓库 “http://packages.elementary.io/appcenter focal Release” 没有 Release 文件。
N: 无法安全地用该源进行更新，所以默认禁用该源。

and

忽略:5 http://ppa.launchpad.net/philip.scott/notes-up/ubuntu focal InRelease     
错误:6 http://ppa.launchpad.net/philip.scott/notes-up/ubuntu focal Release
  404  Not Found [IP: 91.189.95.85 80]
正在读取软件包列表... 完成
E: 仓库 “http://ppa.launchpad.net/philip.scott/notes-up/ubuntu focal Release” 没有 Release 文件。
N: 无法安全地用该源进行更新，所以默认禁用该源。