Please check that your server meets the system requirements.
Interserver - This has become a new favourite of mine. They have all kinds of really powerful and cheap hosting and very excellent service and many different exciting features to use. Including domains, shared/WordPress hosting, transactional email, VPS, dedicated servers, giving you options and room to grow.
RunCloud - Get this for faster, more powerful hosting! Free 5 day trail period to help you get started. RunCloud is not a host but a system to automatically manage the setup and maintenance of a VPS.
Here are some VPS providers you can use:
Vultr - Get $100 sign up credit.
DigitalOcean - Get $100 sign up credit.
UpCloud - Get $25 sign up credit.
Linode - This is another great VPS provider.
You can also use any other VPS providers or even AWS, Lightsail, Azure or Google Cloud Platform.
FastComet - This is another good host. They have cheap shared hosting and great support.
If you have questions feel free to contact me. I can help you get started.