'`vendor/rfs` file not found for @import: /var/www/vhosts/melster-consulting.
   gmbh/httpdocs/vendor/mmos/mmos-meinkicheck/Resources/Public/Scss/Bootstrap/_
   mixins.scss on line 6, at column 1
Call Stack:
#0 import /var/www/vhosts/mel
   ster-consulting.gmbh/httpdocs/vendor/mmos/mmos-meinkicheck/Resources/Public/
   Scss/Bootstrap/_mixins.scss /var/www/vhosts/melster-consulting.gmbh/httpdocs
   /vendor/mmos/mmos-meinkicheck/Resources/Public/Scss/bootstrap.scss on line 1
   2
#1 import /var/www/vhosts/melster-consulting.gmbh/httpdocs/vendor/mmos/mmo
   s-meinkicheck/Resources/Public/Scss/bootstrap.scss (unknown file) on line 1' (607 chars)

'`vendor/rfs` file not found for @import: /var/www/vhosts/melster-consulting.
   gmbh/httpdocs/vendor/mmos/mmos-meinkicheck/Resources/Public/Scss/Bootstrap/_
   mixins.scss on line 6, at column 1
Call Stack:
#0 import /var/www/vhosts/mel
   ster-consulting.gmbh/httpdocs/vendor/mmos/mmos-meinkicheck/Resources/Public/
   Scss/Bootstrap/_mixins.scss /var/www/vhosts/melster-consulting.gmbh/httpdocs
   /vendor/mmos/mmos-meinkicheck/Resources/Public/Scss/app.scss on line 6
#1 im
   port /var/www/vhosts/melster-consulting.gmbh/httpdocs/vendor/mmos/mmos-meink
   icheck/Resources/Public/Scss/app.scss (unknown file) on line 1' (594 chars)