i got this error when am trying to import the content inside the template

Please install sayif_said components and plugins.

Path to extensions:

CMS_ROOT_PATH/templates/test1/extensions/sayif_said.zip

Hi Sayif,

Please also install the Nicepage Joomla plug-in before importing the content. The plug-in is required for the import content action.

...................................................
Sincerely,
Hella
Nicepage Support Team

Please subscribe to our YouTube channel: http://youtube.com/nicepage?sub_confirmation=1
Follow us on Facebook: http://facebook.com/nicepageapp

i already installed nicepage joomla before i import , but i still receive it , the error still there

found the path of the error and tried to extract it and i did but still gotten the same error ,what to do please

i found the error as below

Installation failed
Please uninstall Nicepage component before installing sayif said component
Please uninstall Content - Nicepage Content Editor plugin before installing Content - sayif said Content Editor plugin
Please uninstall System - Nicepage Content Editor plugin before installing System - sayif said Content Editor plugin
Please uninstall Button - Nicepage Content Editor plugin before installing Button - sayif said Content Editor plugin
Go to manage board

now i dont know why its changed yo my name sayif said
how to bring it back to nicepage ?

shall i just change the file name ? or something else

i tried many times to reinstall the nicepage desktop an still the same error

why it change to my name no clue !