Trouble with Astah plugin SDK due to access error to Maven repository

From January 15, 2020, connections to Maven’s central repository have been restricted to https.
This may cause errors when using Astah plug-in SDK.
Astah SysML’s existing bug information
From January 15, 2020, connections to Maven’s central repository have been restricted to https.
This may cause errors when using Astah plug-in SDK.
Astah’s two bugs on macOS High Sierra
– these were fixed in macOS High Sierra 10.13.1 update (Oct.31, 2017)
When exporting Mind Map to PowerPoint (version 2016) by [Tools] – [Mindmap] – [Export PowerPoint] from Main Menu, some European alphabets and Euro signs would be turn into question marks.
Astah crashes when having a mouse over on a tool bar (e.g. when trying to show a tool-tip
Existing bug information in Astah SysML 1.3.1 and Astah Professional 7.0 about being unable to keep Create and Destroy message names empty.