I just purchased the Alliston theme and try to install locally.

The following error then occur during installation of the plugin:

Warning: sprintf(): Too few arguments in ......../wp-admin/includes/class-bulk-upgrader-skin.php on line 150

The plugin is then installed but not activated as selected in the installation screen.
1. Will the installation have problem if I manually activate the plugin because I am afraid that it might be interrupted somewhere?

2. I found that the error appear due to the following suspected bug found:

// class-tgm-plugin-activation.php on line 3602
$this->upgrader->strings['skin_update_successful'] = esc_html__( '%1$s installed successfully.', 'allston' ) . ' <a href="#" class="hide-if-no-js" onclick="%2$s"><span>' . esc_html__( 'Show Details', 'allston' ) . '</span><span class="hidden">' . esc_html__( 'Hide Details', 'allston' ) . '</span>.</a>';
// There are 2 defined variable placeholder for being substituted and expected 2 arguments,
// %1$s
// %2$s

However,

//in class-bulk-upgrader-skin.php on line 150
... sprintf( $this->upgrader->strings['skin_update_successful'], $title ) ...
// Only $title is being put into it

In PHP 5.6.3 tested, this error does not appear.
In PHP 7.19 tested, the error come out.

Am I correct?

And then I try to remove the bug by changing %2$s to something else so that php will not expect a parameter.

It successfully eliminate the error but it will output 2 'Show Details' because WP already have a 'Show Details'.

My WP is 4.9.8 English before installing any other else.