PostCSS with Gulp throws an error after update

I updated npm packages using ncu (npm check updates). After all the packages were updated, the build process is throwing error.

After going through my gulp task and removing a PostCSS plugin called "Precss", all things work. I also tried reverting this plugin alone to an older version, and it works.

Unfortunately Precss is the main plugin that I need, in order to use SASS like features in my CSS. This plugin must have the latest version because another plugin called postcss-calc dependent on Precss plugin.

Below is the error that is thrown:

Node#before is deprecated. Use Node#raws.before
(node:8447) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot set property 'parent' of undefined
(node:8447) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): TypeError: Cannot set property 'parent' of undefined
(node:8447) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 3): TypeError: Cannot set property 'parent' of undefined
(node:8447) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 4): TypeError: Cannot set property 'parent' of undefined
(node:8447) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 5): TypeError: Cannot set property 'parent' of undefined
(node:8447) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 6): TypeError: Cannot set property 'parent' of undefined
(node:8447) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 7): TypeError: Cannot set property 'parent' of undefined
(node:8447) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 8): TypeError: Cannot set property 'parent' of undefined
(node:8447) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 9): TypeError: Cannot set property 'parent' of undefined
(node:8447) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 10): TypeError: Cannot set property 'parent' of undefined

Any help is appreciated. Thanks in advance.

via user7674441