vagrant up時のエラー対応方法

結論

エラーの修正提案内容に沿って対応(vagrant plugin repairなど)したがだめだった。
vagrant plugin updateしたら、すぐ修正できた。

経緯

vagrantをバージョンアップ。
その後、vagrant upしようとするとエラーが発生。

Vagrant failed to initialize at a very early stage:

The plugins failed to initialize correctly. This may be due to manual
modifications made within the Vagrant home directory. Vagrant can
attempt to automatically correct this issue by running:

  vagrant plugin repair

If Vagrant was recently updated, this error may be due to incompatible
versions of dependencies. To fix this problem please remove and re-install
all plugins. Vagrant can attempt to do this automatically by running:

  vagrant plugin expunge --reinstall

Or you may want to try updating the installed plugins to their latest
versions:

  vagrant plugin update

Error message given during initialization: Unable to resolve dependency: user requested 'vagrant-bindfs (= 1.1.4)'

エラーに沿って、
$ vagrant plugin repair
$ vagrant plugin expunge --reinstall
$ vagrant plugin update
を実行するが、以下エラー

$ vagrant plugin expunge --reinstall

This command permanently deletes all currently installed user plugins. It
should only be used when a repair command is unable to properly fix the
system.

Continue? [N]: y

All user installed plugins have been removed from this Vagrant environment!

Vagrant will now attempt to reinstall user plugins that were removed.
Installing the 'vagrant-bindfs' plugin. This can take a few minutes...
Fetching (※省略※)
Fetching vagrant-hostsupdater-1.2.1.gem
Fetching (※省略※)
 (※省略※).....

Vagrant failed to properly resolve required dependencies. These
errors can commonly be caused by misconfigured plugin installations
or transient network issues. The reported error is:

Unable to resolve dependency: user requested 'vagrant-hostsupdater (= 1.1.1.160)'

Unable to resolve dependency: user requested 'vagrant-hostsupdater (= 1.1.1.160)'
ここで引っかかっているラシイ。

Fetching vagrant-hostsupdater-1.2.1.gemだが、
user requestedは 'vagrant-hostsupdater (= 1.1.1.160)'ラシイ。

で、
vagrant plugin update
したら、

$ vagrant plugin update
Updating installed plugins...
Updated 'vagrant-hostsupdater' to version '1.2.1'!

この後、vagrant upしたら、無事に起動できました。