On https://code.dlang.org/packages/dpq2 I clicked at https://dpq2.dpldocs.info/v1.0.23/ and got:

Downloading package info...
Downloading source code for version v1.0.23 from https://github.com/denizzzka/dpq2/archive/v1.0.23.zip...
Unzipping D files...
Generating documentation... this may take a few minutes...
$ './doc2' '--copy-standard-files=false' '--header-title' 'dpq2 v1.0.23 (2021-11-22T22:39:51Z)' '--header-link' 'Home=https://github.com/denizzzka/dpq2' '--header-link' 'Dub=http://code.dlang.org/packages/dpq2' '--header-link' 'Repo=https://github.com/denizzzka/dpq2' '--package-path' 'core.*=//druntime.dpldocs.info/' '--package-path' 'std.*=//phobos.dpldocs.info/' '--package-path' 'arsd.*=//arsd-official.dpldocs.info/' '--postgresConnectionString' 'dbname=adrdox user=root' '--postgresVersionId' '12874' '--document-undocumented=true' '--arcz' '/dpldocs/dpq2/v1.0.23/generated.arcz' '-uiz' '/dpldocs/dpq2/v1.0.23/source/' 2>&1
connection.d(40:26)[warn]: Empty declaration
First pass processing /dpldocs/dpq2/v1.0.23/source/dpq2-1.0.23/example/example.d
object.Exception@doc2.d(4233): you must have a module declaration for this to work on it
----------------
??:? [0x6499e5]
??:? [0x655366]
??:? [0x636ddd]
doc2.d:4233 [0x58e473]
doc2.d:4328 [0x58a45e]
??:? [0x636aab]
??:? [0x6369a7]
??:? [0x6367fd]
??:? __libc_start_main [0x7fdb51f58b96]
../sysdeps/x86_64/start.S:120 [0x404889]
First pass processing /dpldocs/dpq2/v1.0.23/source/dpq2-1.0.23/src/dpq2/package.d
First pass processing /dpldocs/dpq2/v1.0.23/source/dpq2-1.0.23/src/dpq2/result.d
First pass processing /dpldocs/dpq2/v1.0.23/source/dpq2-1.0.23/src/dpq2/value.d
First pass processing /dpldocs/dpq2/v1.0.23/source/dpq2-1.0.23/src/dpq2/oids.d
[...]

The project build failed. It will try again in about 6 hours or you can copy/paste this link to adam (destructionator@gmail.com) so he can fix the bug and/or reset it early. Or the repo is here https://github.com/adamdruppe/dpldocs but i don't often push so it might be out of date.

arsd.cgi.ConnectionException@/home/me/program/lib/arsd/cgi.d(4344): Broken pipe
----------------
??:? void arsd.cgi.sendAll(std.socket.Socket, const(void)[], immutable(char)[], ulong) [0x6121fa]
??:? void arsd.cgi.doThreadScgiConnection!(arsd.cgi.Cgi, dl.app(arsd.cgi.Cgi), 5000000L).doThreadScgiConnection(std.socket.Socket).writeScgi(const(ubyte)[]) [0x61d3a3]
??:? void arsd.cgi.Cgi.write(const(void)[], bool, bool) [0x60c94d]
??:? void dl.app(arsd.cgi.Cgi).__lambda24(immutable(char)[]) [0x567ee1]
??:? void dl.rebuild(void delegate(immutable(char)[]), immutable(char)[], immutable(char)[]) [0x56a083]
??:? void dl.app(arsd.cgi.Cgi) [0x567a70]
??:? void arsd.cgi.doThreadScgiConnection!(arsd.cgi.Cgi, dl.app(arsd.cgi.Cgi), 5000000L).doThreadScgiConnection(std.socket.Socket) [0x61d144]
??:? void arsd.cgi.ListeningConnectionManager.dg_handler(std.socket.Socket) [0x611c06]
??:? void arsd.cgi.ConnectionThread.run() [0x612408]
??:? void core.thread.context.Callable.opCall() [0x6599fc]
??:? thread_entryPoint [0x6594da]
??:? [0x7fe50eca86da]
??:? clone [0x7fe50e00fa3e]