Fixing open bugs on Parse Server open-source project (Express.js)

Parse open-source community is looking for freelancers to fix open bugs in Parse Server repository. This is the first of a series of projects that we will post.

In this first project, we want to select one freelancer to address the following 5 issues that will be considered as the project's milestones:
https://github.com/parse-community/parse-server/issues/7677
https://github.com/parse-community/parse-server/issues/7645
https://github.com/parse-community/parse-server/issues/7763
https://github.com/parse-community/parse-server/issues/7748
https://github.com/parse-community/parse-server/issues/7734

The selected freelancer will have to submit a PR for each of these 5 issues to the Parse Server GitHub repository (https://github.com/parse-community/parse-server) in accordance to our Contributing Guide (https://github.com/parse-community/parse-server/blob/alpha/CONTRIBUTING.md). The following example PR can be used as a reference by the selected freelancer: https://github.com/parse-community/parse-server/pull/7839

Each of the PRs will be reviewed in accordance to our Contributing Guide, which also values code style and quality. For each PR that is approved and merged to the alpha branch, the associated milestone will be considered achieved and the freelancer will be granted 20% of the project's value.

The project will be considered finished when all the 5 PRs are approved and merged to the alpha branch.