@asad.ali,
Please refer below stack trace for HtmlFragment issue in AWS Lambda.
#=zMRzYY9R3Vl6yi4inP6a3ZK9oq9bFp$yGs87z4B8=.#=z4jxOEf2har94(#=zwKtsRxGnVDoV8lws$_y9iFx8Obx8y3LzXg== #=zqQs$llo=, Char #=zUiHEnlY=)
at #=zMRzYY9R3Vl6yi4inP6a3ZK9oq9bFp$yGs87z4B8=.#=z4jxOEf2har94(#=zwKtsRxGnVDoV8lws$_y9iFx8Obx8y3LzXg== #=zqQs$llo=)
at #=zQ7Q8eeBLfKm4pIi$snx96wjdjY9UuRL2pQ==.#=z3ElkS23J7iKd(#=zQ7Q8eeBLfKm4pIi$snx96wjdjY9UuRL2pQ== #=zYMNxJsg=, #=zvz6bct_zFRtU4jKgSpWfBnI4u5bBuOj$1NF8lY8= #=zev8rn6U=, #=zBVfxelXQGGsbjrH_NRuOwVHu$mRXqaAmpQ== #=zrjnqwZc=)
at #=zUC9n57FvIxd1Eh9jSJJra1ypVwZzDU_X1VwuY3g=…ctor(#=zQ7Q8eeBLfKm4pIi$snx96wjdjY9UuRL2pQ== #=zYMNxJsg=, #=zjQRbOT7zIiPJJuE7nq2IBq4BwW6l #=zRBCY2gg=, #=zvz6bct_zFRtU4jKgSpWfBnI4u5bBuOj$1NF8lY8= #=zev8rn6U=)
at #=zQ7Q8eeBLfKm4pIi$snx96wjdjY9UuRL2pQ==…ctor(#=z5fxpW_J4Fh2GPFeeZE81DEo= #=zWdLWOFA=, #=zvz6bct_zFRtU4jKgSpWfBnI4u5bBuOj$1NF8lY8= #=zev8rn6U=, #=zQ7Q8eeBLfKm4pIi$snx96wjdjY9UuRL2pQ== #=z9XQoBLiUYDUj)
at #=zQ7Q8eeBLfKm4pIi$snx96wjdjY9UuRL2pQ==…ctor(#=zmgQsHQ0fvTK1RiSTdZs4sM0= #=z7RU9B9I=, #=zQ7Q8eeBLfKm4pIi$snx96wjdjY9UuRL2pQ== #=z9XQoBLiUYDUj)
at dje_zAWGV7R39LWM26PAYR6TUSKJFFN5X24DYLLQAZYKU_ejd.#=zIr4v2E31Tcap(#=zmgQsHQ0fvTK1RiSTdZs4sM0= #=z7RU9B9I=, #=zMLpeDD7vvDhBYv90tPgQBImi8z53ALeQkQ== #=zKZo4EEQ=, #=zWRUhCzXyojszmBoA1vGhAacjeBq_u$XzLQ== #=z0Cp_CEJ9axfz, #=zvdImhtxPo$T4fl5dTI0nbldr2l0t #=zje0x6V8=, #=zQ7Q8eeBLfKm4pIi$snx96wjdjY9UuRL2pQ== #=z9XQoBLiUYDUj, #=zdppH5dxfBJe5Jw54JXFrPqh$PAs78PVfKA== #=znhTdAzZxjrp3hdg6mg==)
at dje_zAWGV7R39LWM26PAYR6TUSKJFFN5X24DYLLQAZYKU_ejd.#=zwHuG5oU=(#=zmgQsHQ0fvTK1RiSTdZs4sM0= #=z7RU9B9I=, #=zMLpeDD7vvDhBYv90tPgQBImi8z53ALeQkQ== #=zKZo4EEQ=, #=zWRUhCzXyojszmBoA1vGhAacjeBq_u$XzLQ== #=z0Cp_CEJ9axfz, #=zdppH5dxfBJe5Jw54JXFrPqh$PAs78PVfKA== #=znhTdAzZxjrp3hdg6mg==)
at #=ztYZFuw_X_zOs9vwhkrGj3JjXmhdz_MMfKQ==.#=zU5k6q8oKTlVL(#=zvn9ALkUwdUVSXZ0I3BOPfIQ= #=zOBAXFmY=, #=zC3qHqh0JMSMjOKGxa3RJkAlt54Xq #=zxW3wEySsUk2qgIchpQ==, #=zcR9jE0eKS5zqmNI6sRXeq3ApV$1I #=z0BulzFY=, #=zy00zKi9g6s2rlCYLyH22q3ntVMej #=zToHtiOE=)
at #=ztYZFuw_X_zOs9vwhkrGj3JjXmhdz_MMfKQ==.#=zLMyD_nA=(#=zcR9jE0eKS5zqmNI6sRXeq3ApV$1I #=z0BulzFY=, #=zy00zKi9g6s2rlCYLyH22q3ntVMej #=zToHtiOE=)
at #=zy00zKi9g6s2rlCYLyH22q3ntVMej.#=zLMyD_nA=(#=zcR9jE0eKS5zqmNI6sRXeq3ApV$1I #=z0BulzFY=)
at #=z$HL2mkT8MLB$n167p9Ku3R8S9s0X.#=zWWIFCXo=()
at #=z$HL2mkT8MLB$n167p9Ku3R8S9s0X.MoveNext()
at #=znzoTTXv3NQyq5K0RKul_Ti03pwpiGddQlw==.#=z_1H7pgLZitRn(#=zndSqXilF3Osog0Ga6DxD3V4= #=zuRs8sXEHxAzpoGSFYg==, #=zy00zKi9g6s2rlCYLyH22q3ntVMej[] #=zyUS41KSLWa6j, #=zcR9jE0eKS5zqmNI6sRXeq3ApV$1I #=z0BulzFY=, TimeSpan #=ze$_SWv4=)
at #=zoJdleXCqLDG06fPZsfiAlUOoZkCB.Render(#=zcR9jE0eKS5zqmNI6sRXeq3ApV$1I #=z0BulzFY=, TimeSpan #=ze$_SWv4=, #=zvn9ALkUwdUVSXZ0I3BOPfIQ=[] #=zbJWDOj8=)
at #=zE1ve9d8lC0QyRuf_nNrVnr54eeLb.Render(#=zcR9jE0eKS5zqmNI6sRXeq3ApV$1I #=z0BulzFY=, #=zLYSUhy8= #=zOBAXFmY=, TimeSpan #=ze$_SWv4=)
at #=zE1ve9d8lC0QyRuf_nNrVnr54eeLb.Render(#=zcR9jE0eKS5zqmNI6sRXeq3ApV$1I #=z0BulzFY=, #=zLYSUhy8= #=zOBAXFmY=)
at #=ziYYDgCOI9XvuTjGmbALJ5m_MmaaU.#=z95NFQHI3v4mM(Stream #=zag2acIWiccKS, Document #=zb50g2w9M2HsL, HtmlLoadOptions #=z8XWl92SxULqa, IList1 #=zkJpTKIhFB6PT, String #=z8_CisyEchoH1, Matrix #=zvmdo1$U=) at Aspose.Pdf.FormattedFragment.#=zlwotkBg=(Double& #=ztWmGQ7Y=, Double& #=zMS3lGn4=, Boolean #=zCheTKATE5yMY, Double #=zkQO9vd8=, Double #=zt1K9aaM=, List
1 #=zwlckaEo=, List1 #=z7yGQ9RGo$wriK1bMmg==, Int32& #=zaVPZHFHi7RgwKfTGCOgcjMmwSTaR, Page #=zZPNcMZI=, MarginInfo #=zJL8Li9Q=, Table #=zI$TNYMY=, Double& #=z73RngG8BPLOg, Boolean #=zoHL3Vdt6SPTB, Boolean #=z$3F1MZF_0Y0X) at #=z0C6pZ7eoF95JoTwe4XoB6gc=.#=zlwotkBg=() at Aspose.Pdf.Cell.#=z4D_NQvEJ7MrG(Table #=zI$TNYMY=, Double #=zkQO9vd8=, Page #=zZPNcMZI=, Double #=zt1K9aaM=, Double #=zMS3lGn4=, Boolean #=zD4QmsbE9SjEDmhbhLK8reFc=) at Aspose.Pdf.Row.#=zQTGiRSMcafw1OtmlnQ==(Table #=zI$TNYMY=, Page #=zZPNcMZI=, Double #=zMS3lGn4=, Double #=zt1K9aaM=, Int32 #=z1FEnmYU=) at Aspose.Pdf.Row.#=zlwotkBg=(Table #=zI$TNYMY=, Double& #=zMS3lGn4=, Double& #=ztWmGQ7Y=, Boolean #=zCheTKATE5yMY, Double #=zj4uLm9xheKsU, Double #=zt1K9aaM=, Page #=zZPNcMZI=, Int32& #=zYJfQ0USZ7GuP) at Aspose.Pdf.Table.#=zlwotkBg=(Double& #=ztWmGQ7Y=, Double& #=zMS3lGn4=, Boolean #=zCheTKATE5yMY, Double #=zQG05lxjd95HH, Double #=zt1K9aaM=, Page #=zZPNcMZI=, Boolean #=zpTlkjwg40Xjh, List
1 #=zwlckaEo=)
at #=z0C6pZ7eoF95JoTwe4XoB6gc=.#=zlwotkBg=()
at Aspose.Pdf.Page.#=z1OX8yt8=(Page #=zZPNcMZI=)
at Aspose.Pdf.Page.#=zCcx3vQgWgN3SQQ21Sw==()
at Aspose.Pdf.Document.ProcessParagraphs()
at Aspose.Pdf.Document.#=zewfLdEs3iDvF(Stream #=zBp1$Iow=, SaveOptions #=z2aIFS7AYwCBX)
at Aspose.Pdf.Document.Save(Stream output)