I deployed a project and can be accessed using railway domain. When I try to access the project via a custom domain it doesn't work. Here's the details:

1. p2v.yugongtxl.dpdns.org has been well resolved ,if we ping:

   C:\Users\pc>ping p2v.yugongtxl.dpdns.org

   Pinging p2v.yugongtxl.dpdns.org [104.21.77.232] with 32 bytes of data:
   Reply from 104.21.77.232: bytes=32 time=172ms TTL=50
   Reply from 104.21.77.232: bytes=32 time=177ms TTL=50
   Reply from 104.21.77.232: bytes=32 time=179ms TTL=50
   Reply from 104.21.77.232: bytes=32 time=173ms TTL=50

   Ping statistics for 104.21.77.232:
   Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
   Approximate round trip times in milliseconds:
   Minimum = 172ms, Maximum = 179ms, Average = 175ms

2. Cloudflare DNS setting: CNAME P2v 》h23azrlx.up.railway.app Proxy status: Proxied TTL：auto

3. When accessing https://p2v.yugongtxl.dpdns.org/, the page displays: "Missing 'url' parameter."

4. No error in Deploy logs nor http logs.

5. When clicking F12 and checking from the console:
   GET https://p2v.yugongtxl.dpdns.org/ 400
   Uncaught (in promise) {cmd: 'beacon-report-mes', err: {…}}
   (Anonymous) @ translate-api-f5d75aa0.js:16
   Show 1 more frame
   Collapse

   VM75 novel_content.script:947 siteType: other_page originalUrl host: p2v.yugongtxl.dpdns.org
   VM75 novel_content.script:947 originalUrl: https://p2v.yugongtxl.dpdns.org/
   VM75 novel_content.script:947 DomDistiller debug level: 0
   VM75 novel_content.script:3983 extractCost:83
   VM75 novel_content.script:3993 version: 20231205

   VM76 x5_distiller.script:1 siteType: other_page originalUrl host: p2v.yugongtxl.dpdns.org
   VM76 x5_distiller.script:1 DomDistiller debug level: 0
   VM76 x5_distiller.script:1 ContentExtractor::extractContent, userSelectEnabled = true, this = Class$S106@1
   VM76 x5_distiller.script:1 findNext[object HTMLHtmlElement]https://p2v.yugongtxl.dpdns.org/
   VM76 x5_distiller.script:1 findPrevious[object HTMLHtmlElement]https://p2v.yugongtxl.dpdns.org/
   VM76 x5_distiller.script:1 userSelectEnabled: true

PLZ help me out,Thanks!